Ideal pulse-tube refrigerators with real gases

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    The factor of 100 difference between experiments and theory in the coefficient of performance (COP) of pulse-tube refrigerators is always attributed to the nonideal behavior of these devices. We show that the thermodynamic properties of the nonideal working fluid have a profound influence on the COP, explaining one order of magnitude of the observed discrepancy and thus posing more realistic limitations for technological improvements. However, our analysis also shows that the real gas properties of the working fluid can even result in a higher value than predicted, opening prospects for improvements
    Original languageEnglish
    Article number44911
    Pages (from-to)44911-1/4
    JournalJournal of Applied Physics
    Issue number4
    Publication statusPublished - 2005

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